如果您显示的数据确实是固定宽度文件的输出，您需要尝试获取每个字段的宽度以便对其进行解析。这里的一个障碍是原始标题名称包含一个空格字符，我们需要用下划线替换它。
为此，您可以使用以下函数：
function ConvertFrom-FixedWith {
[CmdletBinding()]
Param(
[Parameter(Mandatory = $true, Position = 0)]
[string[]]$Content
)
$splitter = '§¤¶' # some unlikely string: Alt-21, [char]164, Alt-20
$needQuotes = '^\s+|[",]|\s+$' # quote the fields if needed
function _FWClean ([string]$field) {
# internal helper function to clean a field value with regards to quoted fields
$field = $_.Trim() -replace '(?<!\\)\\"|""', '§DQUOTE¶'
if ($field -match '^"(.*)"$') { $field = $matches[1] }
if ($field -match $needQuotes) { $field = '"{0}"' -f $field }
return $field -replace '§DQUOTE¶', '""'
}
# try and calculate the field widths using the first header line
# this only works if none of the header names have spaces in them
# and where the headers are separated by at least one space character.
Write-Verbose "Calculating column widths using first row"
$row = ($Content[0] -replace '\s+', ' ').Trim()
$fields = @($row -split ' ' ) # | ForEach-Object { _FWClean $_ })
$ColumnBreaks = for ($i = 1; $i -lt $fields.Length; $i++) {
$Content[0].IndexOf($fields[$i])
}
$ColumnBreaks = $ColumnBreaks | Sort-Object -Descending
Write-Verbose "Splitting fields and generating output"
$Content | ForEach-Object {
if ($null -ne $_ -and $_ -match '\S') {
$line = $_
# make sure lines that are too short get padded on the right
if ($line.Length -le $ColumnBreaks[0]) { $line = $line.PadRight(($ColumnBreaks[0] + 1), ' ') }
# add the splitter string on every column break point
$ColumnBreaks | ForEach-Object {
$line = $line.Insert($_, $splitter)
}
# split on the splitter string, trim, and dedupe possible quotes
# then join using the delimiter character
@($line -split $splitter | ForEach-Object { _FWClean $_ }) -join ','
}
} | ConvertFrom-Csv # the result is an array of PSCustomObjects
}
使用该函数，可以像这样解析文本：
$text = @"
Customer_ID Client_Name Computer_Name Computer_Brand Duration Connection_Time Lang
123 first last 127.0.0.1 lenovo 10:00 8/18/2019 6:00 PM Eng
1 lastname 127.0.0.2 apple 2:30:00 8/18/2019 1:00 AM Chn
86 user3 127.0.0.1 dell 8/18/2019 2:00 PM
21 user4 127.0.0.4 apple 30:00 8/17/2019 1:00 PM Eng
"@ -split '\r?\n'
# replace the single space characters in the header names by underscore
$text[0] = $text[0] -replace '(\w+) (\w+)', '$1_$2'
# the 'ConvertFrom-FixedWith' function takes a string array as input
$table = ConvertFrom-FixedWith -Content $text
#output on screen
$table | Format-Table -AutoSize
# export to CSV file
$table | Export-Csv -Path 'D:\test.csv' -NoTypeInformation
输出（在屏幕上）
Customer ID Client Name Computer Name Computer Brand Duration Connection Time Lang
----------- ----------- ------------- -------------- -------- --------------- ----
123 first last 127.0.0.1 lenovo 10:00 8/18/2019 6:00 PM Eng
1 lastname 127.0.0.2 apple 2:30:00 8/18/2019 1:00 AM Chn
86 user3 127.0.0.1 dell 8/18/2019 2:00 PM
21 user4 127.0.0.4 apple 30:00 8/17/2019 1:00 PM Eng
如果您的输入 $text 已经是一个字符串数组，存储了我们在您的问题中看到的所有 ines，那么请忽略 -split '\r?\n'
将输入解析为 PsCustomObjects 表后，您可以借助另一个小辅助函数获取连接 30 分钟或更长时间的客户：
function Get-DurationInMinutes ([string]$Duration) {
$h, $m, $s = (('0:{0}' -f $Duration) -split ':' | Select-Object -Last 3)
return [int]$h * 60 + [int]$m
}
($table | Where-Object { (Get-DurationInMinutes $_.Duration) -ge 30 }).Customer_ID
这将输出
1
21
更新
现在我们终于知道数据来自制表符分隔的 CSV 文件，您不需要 ConvertFrom-FixedWith 函数。
如果数据来自文件，只需导入数据
$table = Import-Csv -Path 'D:\customers.csv' -Delimiter "`t"
或者，如果它来自另一个命令的输出为字符串或字符串数组：
$table = $original_output | ConvertFrom-Csv -Delimiter "`t"
然后，像上面一样使用Get-DurationInMinutes帮助函数来获取连接超过30分钟的客户ID：
function Get-DurationInMinutes ([string]$Duration) {
$h, $m, $s = (('0:{0}' -f $Duration) -split ':' | Select-Object -Last 3)
return [int]$h * 60 + [int]$m
}
($table | Where-Object { (Get-DurationInMinutes $_.Duration) -ge 30 }).'Customer ID'